What is NodeJS ? Advantages/Disadvantages of NodeJS
NodeJS is a Javascript runtime environment designed to use Javascript on web servers to manage computing resources, file system, and web application security. Node.js is one of a few server-side solutions based on the concept of event-driven programming, which allows creating highly scalable servers without threading. On top of that, Node supports multiple concurrent requests and operations via asynchronous calls and non-blocking I/O.
Let's see the advantages of NodeJS :
1. Fast server-side solution - Even though NodeJS supports only one thread, its event-based architecture and non-blocking I/O allow for maximising the usage of a single CPU and computer memory which makes it fast and more productive.
2. One language on both the front-end and the back-end - One of the most common issue in web application development is the usage of different languages and environments at the back end and front end. But as NodeJS is written in Javascript which is the dominant language of the front-end development having frameworks such as React, Angular and more. So, we can use one language in both client and server side.
3. Scalable solution - Even though NodeJS is a single-threaded solution, its standard library provides modules that support high scalability. We can easily scale our Node applications to fully functional enterprise solutions.
Now Let's see the disadvantages of NodeJS :
1. Less efficient with CPU-intensive operations - NodeJS comes with certain limitations as far as CPU-intensive operations are concerned. Although Node is great in handling multiple concurrent requests but it lacks in performing some operations such as generating graphics or resizing image.
2. Poor quality or lack of documentations for some modules in npm - NodeJS provides too much freedom of choice for developers in what modules and tools to select. Developers need more planning, time, and involvement to find well-maintained modules and install and integrate them. Unfortunately, some of these modules might be buggy and introduce unexpected behaviour to your Node . So, we need to be careful about it.
Let's see some use cases of NodeJS :
LinkedIn, a large social network for professionals is based on Node.js which reliably serves its ever-increasing load of messages and connections.
As we noted before, Node.js the first platform which enabled using the same programming language for front end and back end. This revolutionary achievement did not go unnoticed by the Mozilla browser which chose Node.js for the possibility of writing both client-side and server-side code in the same language.
eBay, a global e-commerce platformfor C2C and B2B online sales, has appreciated the speed of Node.js and its ability to handle multiple requests simultaneously in real-time.
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